Yup, there's a lawsuit trying to get the raw data behind the 40 percent number [1]. The original report [2] gives two averages, the crash rate per million mile

Yup, there's a lawsuit trying to get the raw data behind the 40 percent number [1]. The original report [2] gives two averages, the crash rate per million miles driven before/after autosteer, 1.3 and 0.8. It doesn't say how many miles were driven, how many crashes, or when any of these occurred, so it's impossible to verify that result. Further, the same NHTSA report notes that AEB reduces rear-end collisions by 40 percent. Supposedly, AEB and autosteer were enabled around the same time. [1] http://www.safetyresearch.net/blog/articles/quality-control-systems-corp-sues-dot-tesla-data http://www.safetyresearch.net/blog/articles/quality-control-... [2] https://static.nhtsa.gov/odi/inv/2016/INCLA-PE16007-7876.PDF https://static.nhtsa.gov/odi/inv/2016/INCLA-PE16007-7876.PDF